<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>帅哥美女走一走</title>
</head>

<body>
    <div id="app">
        <ul>
            <li v-for="(item,index) in List">
                {{item}}
            </li>
        </ul>

        <button @click="fn">走一走</button>
    </div>
    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                List: ['帅哥', '美女', '程序员'],
            },
            methods: {
                fn() {
                    this.List.push(this.List[0])
                    this.List.shift()
                }
            }
        })
    </script>
</body>

</html>